Victoria Police said officers responded to reports of a vehicle fire before they were confronted by the man.

Paramedics said they assessed three people at the scene, one with a neck injury: "They are in a suspected critical condition".

They say there is no known link to terrorism at this stage but are "keeping an open mind".

Victoria Police said a bomb response unit had been called to the area and was now making the scene safe. "A third person has also been taken to hospital". "The area has been cordoned off", police said.

Images from the scene show a large white sheet covering a section of the road near what appears to be blood.

Counter-terror officers have swooped on the scene.

Police are urging people to avoid Swanston Street and Bourke Street.

"He seemed to be waving something, people around me screamed that he had a knife, but I couldn't see clearly from where I was", a witness told ABC News.

Melbourne resident Meegan May tweeted: "Chaos in Bourkest as a guy seems to have set his auto on fire then attacking police with a knife". Police response was swift and overwhelming.

"Police are now at an incident on Bourke St in the CBD". Fully engulfed. Multiple loud bangs."This incident in Bourke Street comes on the second day of the highly-publicised murder trial of James Gargasoulas, who allegedly drove through Bourke Street Mall on January 20, 2017, killing six people and injuring 27 others".

China announced earlier this year that they would allow other countries to conduct experiments on-board Tiangong. NASA and ESA ( European Space Agency ) have brought us the veryfirst 8K video from space .

Mueller's work must proceed free from interference or supervision that would appear to many Americans to be biased". But Mitt Romney , the party's 2012 presidential nominee who was elected on Tuesday to the U.S.

Cagaster of an Insect Cage is a manga-based series that follows the struggle of a young couple trying to stay alive. The executive producer of the show is Jay Olivia who's previously worked on Wonder Woman and The Legend of Korra .

Tom Curry has been ruled out of the remainder of England's autumn series by the ankle injury sustained against South Africa . Cape Town - A world record is in the offing for the All Blacks in their Test against England at Twickenham on Saturday.

He first fired on a person working the door then appeared to open fire at random at the people inside, they said. Ron Helus , who was shot and killed in a mass shooting at a Thousands Oaks, Calif ., bar, November 7, 2018.

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